Active Control Sheet for Wireless EV Charging Alignment
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Solution Overview
Problem
Existing wireless charging systems for electric vehicles require precise alignment of the charge transmitter and receiver, which can lead to inefficiencies and potential interference or health risks due to misalignment, and may not account for the vehicle's movement or position relative to the charging station.
Innovation Solution
A wireless charging system that includes a charge transmitter, a movable charge receiver, and an active control sheet with cells that can be activated or deactivated based on the receiver's location, allowing for efficient magnetic field transmission without the need for exact lateral and longitudinal alignment, using sensors to detect the receiver's position and adjust the active control sheet accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging requires absolute alignment of charge transmitter with charge receiver, then charging efficiency is improved, but ease of operation deteriorates due to difficulty in positioning
Solution Approach 1:
The active control sheet is divided into multiple independently controllable cells arranged in a grid pattern. Each cell can be individually activated or deactivated based on the detected position of the charge receiver, allowing the system to concentrate magnetic field generation only in the relevant area rather than requiring complete alignment across the entire transmitter surface.
Solution Approach 2:
The system dynamically adjusts which cells are active based on real-time detection of the charge receiver's position. The controller continuously monitors the receiver's location and activates or deactivates cells accordingly, enabling the charging area to adapt and move with the receiver rather than requiring the receiver to remain statically aligned.
2Ease of operation
If charge transmitter and charge receiver are not absolutely aligned, then ease of operation is improved, but loss of energy increases due to magnetic field interference
Solution Approach 1:
Instead of uniformly activating the entire active control sheet, the system selectively activates only those cells that are spatially relevant to the charge receiver's current position. This localized activation concentrates the magnetic field precisely where needed, preventing energy waste from generating fields in areas where no receiver is present while eliminating interference with other vehicle components.
Solution Approach 2:
The system converts what would traditionally be considered wasted energy from misalignment into a beneficial feature by using the detected position information to dynamically reconfigure which cells are active. The potential harm of misalignment is transformed into an opportunity to optimize energy distribution by activating only the necessary cells.
3Ease of operation
If charge transmitter outputs magnetic field outside charge receiver when misaligned, then ease of operation is improved, but object-affected harmful factors increase due to interference and health risks
Solution Approach 1:
The magnetic field is generated locally only in the cells that are spatially relevant to the charge receiver's position. By deactivating cells that are not needed for charging, the system prevents magnetic field leakage into areas where it could cause interference with vehicle components or pose health risks to occupants and pedestrians.
Solution Approach 2:
The active control sheet acts as an intermediary between the charge transmitter and the charge receiver. It uses the detected position information to selectively activate cells, thereby mediating the magnetic field transmission to ensure it is directed precisely at the receiver and does not extend into harmful areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient wireless charging of electric vehicle batteries by concentrating the magnetic field on activated cells, reducing alignment requirements and minimizing interference, while ensuring safe and effective charging without the need for precise positioning.
Implementation Method 1
The active control sheet may generate a magnetic field received by the charge receiver. The magnetic field may induce a current in the charge receiver for charging a battery.
Implementation Method 2
The plurality of cells may be activated or deactivated based on a location of the charge receiver relative to the charge transmitter. The active control sheet may generate a magnetic field received by the charge receiver.
Data Source
AI summary
An apparatus and method of wirelessly charging a battery are disclosed. The wireless charging system may include a charge receiver, charge transmitter, and an active control sheet. The active control sheet may include a plurality of cells. The plurality of cells may be activated or deactivated according to the location of the charge receiver relative to the charge transmitter. Charging may be initiated, and electrical charge transferred, from the charge transmitter, through the activated cells on the active control sheet, and to the charge receiver.